At last, some suggestions were raised for the concrete backfill mining.最后对具体的充填开采方法提出了建议.This article is good for promotion of backfill.本文对充填技术的推广,具有一定的参考价值.The upward drift stoping with backfill is a mining method with ...
At last, some suggestions were raised for the concrete backfill mining.最后对具体的充填开采方法提出了建议.This article is good for promotion of backfill.本文对充填技术的推广,具有一定的参考价值.The upward drift stoping with backfill is a mining method with ...
Fools have fortune.傻人有傻福。The greatest lesson in life is to know that even fools are right sometimes.人生最大的教训是要知道即使傻瓜有时候也是对的。A prudent man keeps his knowledge to himself , but the heart of fools blurts out folly.通达人隐藏知识, 愚...
这些岛屿位于千岛群岛的南端。The islands lie at the southern end of the Kurile chain.设得兰群岛是水獭在不列颠群岛上最后的栖息地。Shetland is the last stronghold of otters in the British Isles.他的尸体在离加那利群岛不远的海上被发现。His body was found at sea in waters off the C...